msem-instigator

This spell costs {2} more to cast for each target beyond the first.
Choose one or more —
• Anax's Endeavor deals 2 damage to any target.
• Destroy target nonbasic land. Its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.
• Destroy target artifact. Scry 1.

This spell costs {2} more to cast for each target beyond the first.
Choose one or more —
• Target non-Gorgon creature gets -2/-2 until end of turn. Remove all counters from it.
• Return target creature or planeswalker card from your graveyard to your hand. You gain 4 life.
• Exile target player's graveyard.

Flying
Herald of Oblivion enters with X -1/-1 counters on it, where X is your life total.

Improve {1} ({1}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Whenever Ivy Kissinger, Sharpshooter attacks, choose a creature you control. For each kind of counter among creatures you control, you may put a counter of that kind on the chosen creature.

Bloodprice {B}{B}{B}{B} (You may cast this card by sacrificing a creature and paying its bloodprice.)
Lifelink, haste
Sacrifice another Demon: Jejun, Dark Hunter gains flying and indestructible until end of turn.

Flying, haste
Miyoga Firebird attacks each combat if able.
Whenever you cast your third instant or sorcery spell this turn, you may return Miyoga Firebird from your graveyard to the battlefield.

This spell costs {2} more to cast for each target beyond the first.
Choose one or more —
• Exile target enchantment.
• Target player creates two tapped 1/1 white Soldier creature tokens.
• Taranika's Endeavor deals damage equal to the number of creatures you control to target creature or planeswalker.

This spell costs {2} more to cast for each target beyond the first.
Choose one or more —
• Counter target creature or planeswalker spell with mana value 4 or less.
• Exile target permanent you control, then return that card to the battlefield under your control.
• Target player draws two cards, then discards two cards and mills two cards.

This spell costs {2} more to cast for each target beyond the first.
Choose one or more —
• Counter target activated or triggered ability from a nonland source.
• Vivien's Endeavor deals 6 damage to target attacking creature with flying.
• Target player searches their library for a creature card with colossal, reach, trample, or vigilance, reveals it, puts it into their hand, then shuffles.

Each other creature you control that's a Merfolk or an Elemental gets +1/+1.
Whenever you cast an instant, sorcery, or Merfolk spell, you may pay {1}. If you do, create a 1/0 blue Elemental creature token.